Quiz: Unit 7 LO#2

First Name

Last Name

School ID Number (it's on your lanyard)

#1) The weak bonds between base pairs are called:

• Hydrogen Bonds
• Polar Bonds
• Nonpolar Bonds
• Covalent Bonds

#2) Nucleotides are made of: (1) 5-Carbon Sugar, (2) Phosphate Group, and (3): _____________

• Nitrogenous Base
• Nucleic Acid
• Cholesterol
• Fatty Acid

#3) Which 2 molecules form the sides (backbone) of the DNA ladder?

• Deoxyribose Sugar + Adenine
• Deoxyribose Sugar + Hydrogen Bond
• Deoxyribose Sugar + Nucleus
• Deoxyribose Sugar + Phosphate Group

#4) Which of the following statements best describes the semiconservative model of DNA replication?

• Both strands of the DNA molecule serve as templates for the synthesis of new strands.
• Only one strand of the DNA molecule serves as a template for the synthesis of a new strand.
• The DNA molecule replicates in a random, haphazard manner, resulting in a mix of old and new DNA.
• The two strands of the DNA molecule separate completely, allowing new nucleotides to join together to form two new, identical DNA molecules.

#5) Which phase of the cell cycle does DNA replication occur?

• Prophase
• Synthesis Phase
• Gap 1 Phase
• Telophase

#6) Which step should happen FIRST in order for DNA replication to occur?

• DNA Polymerase adds on nucleotides onto the DNA strand.
• Helicase must separate the base pairs from each other.
• DNA Polymerase reads the base pairs.
• DNA is proofread to check for mistakes.

#7) Label the correct letters the sequence of DNA replication. (a) DNA Polymerase places complementary base pairs onto the template strand. (b) The two copies of DNA fully separate. (c) Helicase separates the DNA strands.

• A ➡️ B ➡️ C
• B ➡️ A ➡️ C
• C ➡️ A ➡️ B
• A ➡️ C ➡️B